Verizon Communications Inc., the regional phone company serving much of the Northeastern United States, suffered a huge hit to its operations as a result of the terrorist attacks that felled the World Trade Center towers last month. In the wake of the attacks, a data tracking and analysis tool from Infragistics Inc. was rushed through beta testing, re-engineered and put into production in less than a week to enable Verizon to manage the work at ground zero to put its network back together. A key to getting the job done quickly, Verizon IT managers said, was their use of Microsoft Corp.'s .Net development tools, which are still in beta versions themselves. The turnaround application, code-named Viper, comprises five multithreaded Visual Basic .Net applications that are used for various mainframe terminal emulation processes. They run on a five-server Web farm under ASP .Net with a clustered session state server and a clustered Microsoft SQL Server 2000 database. Ultra Web Navigator provided the overall menu system that allowed users to access the application's entire feature set while not taking valuable screen space, according to officials.